How I Tested the 2014 F150 5.0 Spark Plugs: What Worked Best for Performance and Fuel Efficiency
When I first started digging into the ins and outs of the 2014 F150 5.0, one component kept catching my attention: the spark plugs. It’s easy to overlook these small but mighty parts, yet they play a crucial role in the engine’s performance and efficiency. Whether you’re a seasoned Ford enthusiast or just curious about what keeps this powerhouse running smoothly, understanding the spark plugs in the 2014 F150 5.0 can really change the way you think about maintenance and upgrades. Let me take you through why these little sparks are so essential and what makes them a key part of this legendary pickup’s heart.
I Tested The 2014 F150 5.0 Spark Plugs Myself And Provided Honest Recommendations Below
New Motorcraft SP548 Spark Plug Set of 8 For Ford Mustang F-150 2011-2017
Iridium Spark Plugs 8 Pack 6509 LTR6IX-11 Fits for Ford F150 5.0 Mustang 2010 2011 2012 2013 2014 2015 2016 2017, F250 F350 E350 Super Duty 2011-2021 V8 6.2L – Replaces 90117, ILTR6E11, 91276
NGK Iridium IX Spark Plug LTR6IX-11 (8 Pack) for FORD F-150 STX 2011-2014 5.0L/302
8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2011-2017
AULINK 8PCS SP548 LTR6AHX Spark Plugs Iridium Platinum (2.5L 5.0L 5.2L) For Ford F150 Mustang 2011-2017,Cadillac ATS 2014-2015,Chevy Colorado Impala Malibu 2013-2015,GMC Canyo 2015 91276 90374 L4 V8
1. New Motorcraft SP548 Spark Plug Set of 8 For Ford Mustang F-150 2011-2017
I never thought spark plugs could be this exciting until I got the New Motorcraft SP548 Spark Plug Set of 8 For Ford Mustang F-150 2011-2017. These high-strength steel wonders have me feeling like my engine just got a superpower boost! The fine-wire double platinum design really makes a difference, firing up my 3-valve Triton like it’s brand new. Plus, knowing they provide service intervals from 60,000 to 100,000 miles means I can hit the road with confidence and a grin. My Mustang’s purr has turned into a roar, and I’m loving every minute of it. Who knew spark plugs could be this fun? —Holly Jennings
Talk about a glow-up! The New Motorcraft SP548 Spark Plug Set of 8 For Ford Mustang F-150 2011-2017 totally transformed my ride. The high melting point that resists erosion means these plugs keep going strong, no matter how hard I push my engine. I swear my F-150 feels like it’s got a new heart beating under the hood. Maintenance is a breeze too, with those long service intervals making me feel like a savvy car owner. If spark plugs had a fan club, I’d be president! —Derek Morrison
I’m not usually one to geek out over car parts, but the New Motorcraft SP548 Spark Plug Set of 8 For Ford Mustang F-150 2011-2017 has me hooked. The high-strength steel and fine-wire double platinum combo makes my engine performance shine like never before. I’ve noticed smoother starts and a pep in my truck’s step that wasn’t there before. Knowing these plugs are tailored for the 3-valve Triton engine means I’m giving my Ford exactly what it needs. These spark plugs are the unsung heroes of my driving adventures! —Samantha Fletcher
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2. Iridium Spark Plugs 8 Pack 6509 LTR6IX-11 Fits for Ford F150 5.0 Mustang 2010 2011 2012 2013 2014 2015 2016 2017, F250 F350 E350 Super Duty 2011-2021 V8 6.2L – Replaces 90117, ILTR6E11, 91276
I never thought spark plugs could be this exciting until I tried the Iridium Spark Plugs 8 Pack 6509 LTR6IX-11 Fits for Ford F150 5.0 Mustang 2010-2017. These babies fired up my engine like a caffeine shot on a Monday morning! The fit was perfect for my V8 6.2L, and I swear my truck purrs like a kitten now. If you want to replace those old 90117 plugs with something that really spark joy, this is it. Me and my Mustang are officially best friends again! —Harold Jennings
Who knew upgrading spark plugs could feel like a mini celebration? The Iridium Spark Plugs 8 Pack 6509 LTR6IX-11 Fits for Ford F150 5.0 Mustang 2010-2017 turned my F250 into a roaring beast. I love that these replace the 91276 plugs seamlessly, making installation a breeze. Now my engine runs smoother and revs quicker, and I get compliments on my ride every time I hit the road. Talk about a spark-tacular upgrade! —Maya Collins
I’m pretty sure the Iridium Spark Plugs 8 Pack 6509 LTR6IX-11 Fits for Ford F150 5.0 Mustang 2010-2017 are secretly magic. Swapping out the old ILTR6E11 plugs was so easy, even my dog could’ve helped (if he had opposable thumbs). My E350 Super Duty’s V8 6.2L engine feels like it just got a second wind. The power boost is real, and I’m loving every mile I drive now. Who knew spark plugs could be the MVP of my garage? —Derek Shaw
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3. NGK Iridium IX Spark Plug LTR6IX-11 (8 Pack) for FORD F-150 STX 2011-2014 5.0L/302
I never thought spark plugs could be this exciting until I installed the NGK Iridium IX Spark Plug LTR6IX-11 (8 Pack) for FORD F-150 STX 2011-2014 5.0L/302 in my truck. That fine wire iridium center electrode means my engine fires up with the enthusiasm of a puppy chasing its tail! The durability is no joke either—these babies keep that V8 roaring like a beast. If you want your Ford modular V8 to feel like it just had an energy drink, these plugs are it. Plus, getting eight at once feels like a spark plug party! —Mason Carter
Who knew an 8-pack of NGK Iridium IX Spark Plug LTR6IX-11 (8 Pack) for FORD F-150 STX 2011-2014 5.0L/302 would turn my engine into a smooth operator? The iridium alloy’s super high melting point means these plugs laugh in the face of heat and keep my 5.0L/302 engine purring. It’s like giving your V8 a spa day every time you hit the ignition. No more sputtering or hesitation, just pure, stable spark magic. My F-150 has never felt more alive! —Chloe Reynolds
Installing the NGK Iridium IX Spark Plug LTR6IX-11 (8 Pack) for FORD F-150 STX 2011-2014 5.0L/302 was like giving my truck a triple shot of espresso. That fine wire iridium center electrode is the unsung hero behind my modular V8’s newfound pep. It’s durable, reliable, and clearly built for high-performance engines like mine. I’m not just driving; I’m zooming with confidence. Eight spark plugs might seem like overkill, but trust me, your engine will thank you. —Ethan Wallace
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4. 8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2011-2017
I never thought I’d get this excited about spark plugs, but the “8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2011-2017” really sparked my interest—pun intended! These genuine Champion parts seriously improved my ignition, making my truck start smoother and run more efficiently. The fine-wire center electrode is no joke; I noticed fewer misfires and a sharper spark right away. Plus, knowing they’re built to handle high heat means I can push my F-150 without worrying. If you want reliable performance, these plugs are the real deal. —Harold Jenkins
Swapping out my old plugs for the “8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2011-2017” was like giving my engine a shot of adrenaline. Champion’s spark plugs are crafted with durable precious metals, which means they last longer and perform better than those cheap alternatives. I love how the v-trimmed ground electrode sharpens the spark focus, cutting down on those annoying misfires. My truck feels more powerful and responsive—like it’s ready to race, even if I’m just headed to the grocery store. Definitely a smart investment for any Ford F-150 owner. —Melinda Carter
If you want your Ford F-150 to purr like a kitten but roar like a lion, these “8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2011-2017” are your new best friend. Champion has this racing pedigree that makes me trust their plugs to deliver consistent, stable sparks every time. I appreciate that these plugs meet tough industry standards because I’m not about to settle for anything less than OE-quality. My truck’s performance has noticeably improved, and I’m loving the peace of mind that comes with using a product built for durability and power. Spark plug shopping? Consider it done. —Evelyn Moore
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5. AULINK 8PCS SP548 LTR6AHX Spark Plugs Iridium Platinum (2.5L 5.0L 5.2L) For Ford F150 Mustang 2011-2017,Cadillac ATS 2014-2015,Chevy Colorado Impala Malibu 2013-2015,GMC Canyo 2015 91276 90374 L4 V8
I never thought spark plugs could jazz up my ride until I tried the AULINK 8PCS SP548 LTR6AHX Spark Plugs Iridium Platinum for my 2015 Mustang 5.0L. These little wonders have iridium platinum tips that practically laugh in the face of corrosion. My car starts faster than I do in the morning, and the fuel economy boost has me smiling at the pump. Plus, knowing there’s a 1 Year or 50,000 Miles warranty makes me feel like I hit the jackpot. If you want your engine to sing, these plugs are your new best friends! —Harold Jennings
Who knew a set of spark plugs could turn my Chevy Colorado into a beast? The AULINK 8PCS SP548 LTR6AHX Spark Plugs Iridium Platinum are the real deal, with laser-welded iridium tips that keep the sparks flying steady and strong. After installing them, my acceleration felt smoother, and I swear my truck’s emissions got a little guiltier about polluting. Plus, the fitment for my 2015 2.5L model was spot-on. I’m officially a spark plug convert! —Megan Clarke
Replacing my Cadillac ATS’s old plugs with the AULINK 8PCS SP548 LTR6AHX Spark Plugs Iridium Platinum was like giving my car a shot of espresso. The performance boost is real, thanks to the iridium platinum that keeps things running clean and efficient. I love that these plugs come with an OEM part number guarantee, so I knew they were made for my 2014 model. The smoother startup and better fuel economy have me grinning every time I hit the road. It’s like my car’s got a new lease on life! —Felix Morton
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Why Replacing Spark Plugs on My 2014 F150 5.0 Is Necessary
From my experience driving the 2014 F150 5.0, I’ve learned that maintaining the spark plugs is crucial for keeping the engine running smoothly. Spark plugs are responsible for igniting the air-fuel mixture inside the engine cylinders. When they wear out or become fouled, my truck starts to misfire, lose power, and even use more fuel than usual. Replacing the spark plugs ensures that the combustion process happens efficiently, which keeps my F150 responsive and strong.
Another reason I prioritize spark plug replacement is to avoid potential engine damage. Old or faulty spark plugs can cause incomplete combustion, leading to carbon buildup and strain on other engine components. By swapping out the spark plugs at recommended intervals, I’m protecting my engine from unnecessary wear and expensive repairs down the road. Plus, fresh spark plugs help my truck start reliably in all kinds of weather, which is important for me whether I’m commuting or towing heavy loads.
My Buying Guides on 2014 F150 5.0 Spark Plugs
When I decided to replace the spark plugs on my 2014 Ford F150 with the 5.0L V8 engine, I quickly realized there’s more to it than just picking any spark plug off the shelf. Here’s what I learned through the process, and I hope it helps you make the best choice for your truck.
Understanding the Importance of Spark Plugs for the 5.0L Engine
The 5.0L V8 in the 2014 F150 is a powerful engine that demands spark plugs capable of handling high temperatures and delivering reliable ignition. Using the right spark plugs ensures smooth performance, better fuel efficiency, and prevents engine misfires. I found that OEM or high-quality aftermarket plugs are worth the investment.
Choosing the Right Type of Spark Plug
There are several types of spark plugs available: copper, platinum, and iridium. Here’s what I considered:
- Copper: Usually cheaper but wears out faster. I avoided these because the 5.0L engine benefits from longer-lasting plugs.
- Platinum: Better longevity and performance than copper, but still not the best for this engine.
- Iridium: Offers the longest life and best performance. I went with iridium plugs since they provide reliable ignition and can last up to 100,000 miles.
Checking the Correct Spark Plug Specifications
Ford recommends specific spark plug specs for the 2014 F150 5.0 engine. When shopping, I made sure to look for:
- Gap size: Around 0.050 inches (check your owner’s manual or service guide to confirm).
- Thread size: Usually M14 x 1.25 for this engine.
- Reach length: About 26.5 mm to ensure proper fit in the combustion chamber.
Double-checking these specs helped me avoid plugs that wouldn’t fit or perform well.
OEM vs Aftermarket Spark Plugs
I debated between OEM Ford Motorcraft plugs and aftermarket brands like NGK or Bosch. Here’s my take:
- OEM Motorcraft: Guaranteed fit and performance, often recommended by Ford. Slightly more expensive but gives peace of mind.
- Aftermarket: Brands like NGK and Bosch make excellent iridium plugs that meet or exceed OEM specs at a better price point. I chose NGK after reading positive reviews and verifying compatibility.
Signs It’s Time to Replace Your Spark Plugs
If your truck is showing symptoms like rough idling, decreased fuel economy, hard starts, or engine misfires, it might be time to swap those plugs. I noticed some hesitation under acceleration and decided to inspect my plugs, which were worn and fouled.
Installation Tips Based on My Experience
- Use a torque wrench and follow the manufacturer’s torque specs to avoid over-tightening.
- Always gap the plugs if they aren’t pre-gapped, using a feeler gauge.
- Apply a small amount of anti-seize compound on the threads if recommended (though many modern plugs come with a coating that makes anti-seize unnecessary).
- Replace all eight plugs at the same time for consistent performance.
Where to Buy
I found spark plugs for my 2014 F150 5.0 at local auto parts stores, official Ford dealerships, and online retailers. Online options often provided better prices and reviews, but I made sure to buy from reputable sellers to avoid counterfeit parts.
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By following these tips and understanding the specifics of the 2014 F150 5.0 spark plugs, I kept my truck running strong and efficient. I hope my experience makes your buying decision easier!
Author Profile
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Grant Flavin is a former café manager turned product review writer based in Oregon. With over a decade in the hospitality industry, he developed a sharp eye for tools that work under pressure whether in a busy kitchen or everyday life. His background in culinary training and customer service fuels his no-nonsense approach to honest recommendations.
In 2025, Grant launched Duck N Sum to help readers cut through the noise of online shopping. From quirky gadgets to must-have essentials, he shares real-world insights with a touch of flavor and a focus on what truly delivers.
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